D-Link DU-H4 User manual

DU-H4
4-port USB Hub
User’s Manual
Rev. 01 (Oct. 2000)
Printed In China

2
INTRODUCTION
Thanks for purchasing the D-Link 4-Port USB
Hub. This easy plug and play external device
will allow your computer to connect to USB
interfaced monitors, printers, digital speakers,
modems, digital cameras, joysticks and other
USB devices.
Technology Overview
USB stands for Universal Serial Bus. It’s a
standard that has been adopted by leading
manufacturers within the computer industry to
define a new type of peripheral connection
scheme. It is designed to replace older parallel
and serial ports, cables, and connectors with
something faster and easier to use. USB is:
?? Easier --Windows 98, 2000, Me orMAC
OS will automatically recognize newly
installed devices.
?? Quicker -- You won’t have to reboot when
installing.
?? Faster -- Top USB data speed is around 100
times faster than a serial connection.
?? Greater Expandability -- Using USB hubs
you can connect up to 127 devices to your
computer.
?? Hot Swappable -- They just plug and play!

3
About the 4-Port USB Hub
The 4-Port USB Hub allows users to connect up
to four USB peripherals to their USB ready PC
or Mac.
The 4-port USB Hub is designed to provide
quicker and easier access to four type “A”
downstream ports for connecting peripherals
with USB support, USB hubs and other devices.
A single type “B” upstream port is provided for
connecting to the host computer, or another USB
hub.
Product Features
?? USB 1.1 specification compatibility
?? Plug-and-Play
?? Supports both OHCI and UHCI.
?? Supports Self-power mode.
?? Supports Bus-power mode.
?? Supports 1 upstream and four downstream
USB ports
?? One LED indicator for Self-power mode
?? One LED indicator for Bus-power mode
?? One LED indicator for each downstream
port status
?? Connects up to127 USB devices with
cascading hub.
?? Over-current and high-inrush current
protections

4
INSTALLATION
The 4-Port USB Hub is designed to be simple
and easy to install.
Application Diagram

5
Hardware Installation
1. Plug the included adapter into the rear of
the 4-Port USB Hub and an available
electrical outlet.
2. Plug the B-type connector into the
“Upstream Port”.
3. Plug the A-type connector into a computer
or USB Hub downstream port.
4. Connect USB devices to the Hub.
LED Indicators
The 4-Port USB Hub is equipped with LED
indicators:
Self-Power LED Indicator:
This indicator lights red when the USB Hub is
receiving power from external power source,
otherwise, it is off.
Bus-Power LED Indicator:
This indicator lights green when the USB Hub is
receiving power from USB bus, otherwise, it is
off.
Port status LED:
Per port has one status LED. When the LED
lights on, means the downstream port is working
successfully. Otherwise, the LED light is off.

6
USB Connector Pin Assignment
Receptacle A Series-A Plug
Receptacle B Series-B Plug

7
SPECIFICATIONS
Standards: USB Specification V.1.x compatibly
Data Speed: Low:1.5Mbps,High:12Mbps
LED indicators: 4-Port: Power x 2, Port status x 4
Upstreamport: Series-B Receptacle x 1
Downstream port:
4-Port: Series-A Receptacle x 4
Output Voltage: Per port DC +5V
Output Current: 4-Port: Per port 500mA
ExternalPower: power adapter
Dimensions: 67mm x 125mm x 23mm